File Hash Calculator

Calculate SHA-256, SHA-384 and SHA-512 checksums of any file — free file hash checker.

File

About

About the File Hash Calculator

Calculates a file's SHA-256, SHA-384 and SHA-512 checksums so you can verify it hasn't been corrupted or tampered with.

Developers use it to confirm a downloaded package or installer matches the checksum its publisher listed, while IT and security teams use it to fingerprint a file for a record or an investigation. It's one of many free data tools on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.

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Guide

Using the File Hash Calculator

  1. 1

    Step 1

    Click to upload or drag and drop any file.

  2. 2

    Step 2

    Its SHA-256, SHA-384 and SHA-512 checksums are calculated automatically.

  3. 3

    Step 3

    Compare a checksum against the one published by whoever provided the file to confirm it matches.

  • Calculates three checksums at once — SHA-256, SHA-384 and SHA-512 — instead of just one
  • Works with any file type, not just images or documents
  • Uses your browser's built-in Web Crypto API, so results are accurate and fast
  • Works entirely in your browser — the file itself is never uploaded anywhere
  • Free to use, with no limit on how many times you run it
  • Fully responsive, so it works just as well on a phone as on a desktop

Developers

Developers use the File Hash Calculator for confirming a downloaded package, installer or release archive matches the checksum its publisher listed.

IT and security teams

IT and security teams use the File Hash Calculator for fingerprinting a file for a record, an audit trail or an investigation.

System administrators

System administrators use the File Hash Calculator for verifying a backup or transferred file arrived without corruption.

Anyone sharing files

Anyone sharing files uses the File Hash Calculator for giving the recipient a checksum to confirm the file they received is identical to the one that was sent.

Examples

File Hash Calculator examples

3 worked examples

01

Verifying a small text file

Upload a hello.txt containing exactly "hello world" (no newline) to get the SHA-256 b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9, alongside its SHA-384 and SHA-512 values.

02

Confirming a download

Upload installer.exe from a vendor's site and compare the calculated SHA-256 against the one published on their download page — matching values confirm the file wasn't corrupted or altered.

03

Detecting tampering

Upload the same file again after just one byte has changed, and every checksum — SHA-256, SHA-384 and SHA-512 — comes out completely different from the original.

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FAQ

Frequently asked questions

Quick answers to common questions about the File Hash Calculator.

What does the File Hash Calculator do?

It calculates a file's SHA-256, SHA-384 and SHA-512 checksums, which you can compare against a published value to confirm the file hasn't changed.

Is the File Hash Calculator free to use?

Yes. It's free, with no sign-up, no watermark and no limit on how many times you use it.

Is my file safe when I use this tool?

Yes. The file is read and hashed entirely on your own device using your browser's built-in Web Crypto API — it's never uploaded to a server.

Which checksum should I use to verify a file?

Use whichever one the file's publisher provided. SHA-256 is the most common choice today. Some publishers still list older MD5 or SHA-1 checksums — this tool doesn't calculate those, since both are no longer considered secure against deliberate tampering.

What does it mean if the checksums don't match?

It means the file you have differs from the one the checksum was generated for — even a single changed byte produces a completely different hash — so the download may be corrupted or incomplete.

Can I hash very large files?

Yes, though very large files take longer to process since hashing happens entirely on your own device and depends on its processing speed.

Can I use the File Hash Calculator on my phone?

Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike.

Does the File Hash Calculator have any limitations?

It calculates standard cryptographic checksums for any file type; it doesn't inspect or validate the file's internal format.

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